The existence of mentally retarded children in the family caused despair, frustration and isolation of individual and family are and their push for diversity issues on individual family members and parents as a marital unit and the total family system as a family show.

This study compared the amount of stress parents feel mentally retarded children with parents is normal.

The study after the event (Ali - a comparison) is.The sample of 120 parents of retarded children and 120 parents of normal children using a sampling Chndmrhlh chosen. To check the source of feeling stress questionnaire stress (QRS) was used and analysis of data by independent t tests May Pearson.

Results showed that parental stress in two groups of mentally retarded children and parents have significantly different normal and feeling stress parents of mentally retarded children than parents were normal. Between mothers and fathers of mentally retarded children in terms of Nshdv significant difference in stress levels stress parents of mentally retarded children were the same.the child's gender had no impact on parent stress levels, but between the retarded child's age and parental stress there was a significant relationship, whatever the case retarded child's age increased parental stress will increase. Similarly, parental education and children backward stress there was no significant difference whatever the parents are more educated than parents with lower education have less stress.

The results show parents of mentally retarded children than normal children, parents significantly more stress they endure.